<template>
  <div>
    <div v-for="(item,index) in arr" :key="index" style="display:inline-block">
    <input type="checkbox"  v-model="checkArr" :value="item">
    <span>{{item}}</span>
    </div>
    <p>你选中的元素,累加的和为:{{total}}</p>
  </div>
</template>

<script>
export default {
  data(){
    return{
      arr:[9, 15, 19, 25, 29, 31, 48, 57, 62, 79, 87],
      checkArr:[]
    }
  },
  computed:{
    total(){
      return this.checkArr.reduce((accu,item)=>{
        return accu+item
      })
    }
  }
}
</script>

<style>

</style>